
I can help.
Here's the current tech stack from high-level to low-level. There is a separate implementation of a scroll bar in every level, except the BIOS.
.net 5.0
.net 5.1
.net 4
.net 3
.net 8
C++ForC++
C++BindingLayer 5.8
GNU/StdC++ 6.0
Common/Net
Net/CommonRuntime++
Common/Runtime/Net 8.0
Uncommon/Net
.Net
.NetNet++
WPS 6.5
WPS 9.8++
Com++
Com+
JavaForNet
NetForWPS
WPSForJava++
Net/Java/Common/Runtime/CLR++
CLR/Net/WPS++
CLRForNet
WindowsFoundationAPI
WindowsOpenFoundationAPI++
COM++
Foundation/COM 3.0
COMFoundationComponentsForWPF++
WPFFoundationComponentsForCOM 4.0
WPFFoundationComponentsForCOM 3.1
WPFFoundationComponentsForCOM 6
WindowsFoundation
WindowsKernelFoundation
Wow64
Win32
Win16
TeamsFoundation++
MSDOSForLinux.
Linux.
BIOS.
.net 5